When the backup task failed, [Exit Code:-311] is outputted in task log

SymptomsWhen the backup task failed, [Exit Code:-311] is outputted in task.This is the error associated with the VSS (Volume Shadow Copy), occurs in the preparation stage of the snapshot.Check the error in Windows event log.

Windows Application log:Log Name: ApplicationSource: VSSLevel: Error

Windows System log:Log Name: SystemSource: volsnapLevel: Error

Resolution- Existence confirmation of tracking driversSystem Information -- software environment -- Check if there is "aiptrack" to the system driver.

- Reboot the OS after installation.If you have not done a reboot after installation, it does not work properly.* In Windows 2000, error -999 occurs, because the VSS is not implemented.

- Upgrade to the latest version

- Check the RegistryIf Registry value is wrong, -311 error occurs.

Registry check and repair procedure:1) Start the command prompt, type regedit, and then start the Registry Editor.2) Delete the blank line of UpperFilters.